[Feature]: 增加上传图片、PDF时【仅识别文字 】OCR 功能

[Anesthetize18]

Issue Checklist

• I understand that issues are for reporting problems and requesting features, not for off-topic comments, and I will provide as much detail as possible to help resolve the issue.
• I have checked the pinned issues and searched through the existing open issues, closed issues, and discussions and did not find a similar suggestion.
• I have provided a short and descriptive title so that developers can quickly understand the issue when browsing the issue list, rather than vague titles like "A suggestion" or "Stuck."
• The latest version of Cherry Studio does not include the feature I am suggesting.

Platform

Windows

Version

v1.0.0

Is your feature request related to an existing issue?

增加上传图片、PDF时【仅识别文字】功能

Desired Solution

1、Deepseek R1官网对话虽然也不支持图片理解，但是可以上传图片（仅识别文字）。能否在cherry studio的客户端也增加这个功能，使得上传图片的功能与官网一致？
2、上传PDF也遇到相同的问题，有些以【图片形式】生成的PDF在deepseek官网是可以读取内容的，但是在cherry studio客户端没有办法被正确读取内容。能否支持对于这类PDF的读取功能？

Alternative Solutions

No response

Additional Information

No response

[SteveXu9102]

或者添加一个选项在上传PDF时自动调用文档处理服务也不错